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What phrase best describes This type of reaction and the overall energy change that occurs?
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What is the sign for Energy change of an endothermic reaction?
The products of the reaction will have less energy than the reactants
What describes the energy of activation?
Activation energy is the least amount of energy needed to start a chemical reaction. It is used to activate atoms or molecules in order for them to begin a chemical reaction.
What describes the potential energy diagram of an exothermic reaction?
The potential energy of the reactants is greater than the potential energy of the products.
What type of reaction releases energy and does not require initial energy to occur?
All reactions require an activation energy. Some appear not to because that energy is provided enough by their temperature. Thus, there is no reaction that does not require any initial energy to occur. A reaction that results in an overall release of energy is called an exothermic reaction.
How does the presence of a catalyst affect the enthalpy change of a reaction?
The presence of a catalyst affect the enthalpy change of a reaction is that catalysts do not alter the enthalpy change of a reaction. Catalysts only change the activation energy which starts the reaction.
What type of reaction is exothermic reaction?
The reaction in which energy is being released, and the overall energy change (enthalpy) is negative.
What describes how much energy is produced or used during a chemical change?
The enthalpy of reaction
The reaction in photosynthesis can be endergonic or exergonic?
The energy balance for the overall reaction does not determine if the reaction needs energy input to occur, or not. The requirement, or not, for energy input, depends on the activation energy and that is independent of the overall enthalpy change. There is no answer to your question - it could be any, all or none.
In a nuclear reaction WHAT does not have to be conserved?
While overall ENERGY has to be conserved, MASS does not. In a nuclear reaction mass can be converted into energy so the mass of the products may be less than the mass of the reactants. The difference in mass is converted into energy as Einstein's equation describes (E=MC squared). In a chemical reaction MASS has to be conserved.
How would a catalyst change the reaction energy diagram?
The overall enthalpy change in a common reaction would not change. Only the path to get there would change. A catalyst basically lessens the activation energy required to get the reaction to take place.
What chemical reaction describes where energy is absorbed?
Endothermic, if the energy is in the form of heat.
Which pair of terms best describes the type of change that occurred in the reaction hydrogen plus oxygen leads to water plus energy?
chemical and exothermic
Hess's law is based on what principle?
Hess's law is based on the principle that the enthalpy change of a reaction is independent of the pathway taken. This means that the overall enthalpy change for a reaction is the same, regardless of the number of steps involved in the reaction as long as the initial and final conditions are the same.
What happens to the potential energy of the molecule in the reaction?
The potential energy of the molecules change during a reaction.
What is the sign for Energy change of an endothermic reaction?
The products of the reaction will have less energy than the reactants
endothermic?
A reaction where energy is taken in.
What describes the energy of activation?
Activation energy is the least amount of energy needed to start a chemical reaction. It is used to activate atoms or molecules in order for them to begin a chemical reaction.
